Container cover



June 2, 1931. R. c. EUWER CONTAINER COVER Filed April 12, 1929 Qvweutoz Poer/ Clan 6f 85 h/k 61am? Patented June 2, 1931 PATENT; OFFICE UNITED STATES ROBERT C. EUWER, OF WHEE'LING, WEST VIRGINIA conramna covmr.

Application filed April 12,

containers the opening is often not a true circle, a crimping apparatus causes an unequal pressure to bear against the periphery of the container. Such an unequal pressure causes a high percentage of breakage during the capping process resulting in a large financial loss in the containers as well as a loss of the material within the container. Further-the usual type of cover used is such that it is not adaptable to reuse as a cover for the container after it has once been removed. The primary object of my invention is to eliminate the disadvantages stated above in connection with the old type of cover. Other objects and advantages of my invention will become apparent from the following description and drawings in which: Figure 1 represents a side container closed by my cover;

Figure 2 represents a broken cross section of Figure 1;

Figure 3 represents a perspective view of my cover;

Figure 4 represents a gasket used with my cover; and Figure 5 represents across section of my cover and gasket before applying.

Referring more particularly to the drawings, Figure 1 shows my type of cover 1 placed on a container 2. In the cross section shown in Figure 2, it can be seen that cover 1 rests on the container 2, the upper edge of which is enclosed by the turned-down edge 3. This ring edge 3 has impressed init the groove 4 which extends circumferentially around the side 3 of the cover 1. The lower portion of side 3 is turned inwardly, forming-the edge 5. Placed inside of the cover elevation of a .which may be made use the vacuum boxes. filled, the covers drop'loosely into place on 1929. serial No. 354,505.

the side 3 is the gasket 6 of rubber or any other resilient material. The turned-in edge 5 of the cover holds the gasket 6 from slipping outof the cover. 5 A distinct advantage of my type of cover is the simplicity and ease with which it may be applied to a container. This maybe done in a variety of ways, but for purposes of illusand resting against tration I will describe-a simple procedure.

The cover is dropped into place on top of the container merely resting loosely on it.. The

cover is deep enough so that it does not tend to slide oii. Several of the containers with the covers resting thereon may then be put into a vacuum box of the conventional type.

The air is then exhausted from the box holding the containers and also is exhausted from within the containers inasmuch as the cover resting loosely on the top will lift up allowing the air within the container to be withdrawn. After the air has been exhausted from the vacuum boxes the covers are pushed down on to the containers making a seal between the gasket 6 and the lip 7 of the con-. 7 tainer. This may be done by any simple means either individually with each cover and container, or a plunger maybe arranged so that it seats several covers at once. The air is then admitted to the vacuum box and so the containers removed. On the admission again of air, the difference in pressure between the outside of the cover and the inside of the cover is such that the atmospheric pressure will firmly seat the cover in place.

In some cases where the containers are filled with a hot liquid it is not necessary to The containers are top of them, and then seated by means of some plunger arrangement such that the gasket makes a firm contact with the lip of the container 7. Then the containers are allowed to cool. During the cooling process, of course, what air remains within the containers contracts causing a difference in pressure between the inside and outside of the containcrs which cliilerence in pressure tends to firmly seat the cover on the container In glam containers, it is often the case that of an oblong shape.

their opening is not a true circle, but may be In this case when crimped tops or covers are used, the machinery which fixes them in place will bear with an uneven pressure around the periphery. and, for example, at the long axis of the oblong the pressure may become great enough to crack thev glass. This, of course, is a financial loss due to theloss of both the container and the material therein. Also when a crimp cover is used with a container which does not have an opening which is a true circle or inother words which is out of round, the cover forms an uneven contact with the lip of the container, allowing air to pass into the container with resulting detrimental effects to the material therein. f

My cover is adapted to overcome these and other difficulties in closing the openings of containers. The resilient gasket Will flow due to the pressure of the groove 4 in such a way as to compensate for any irre ularities in the openin or in the thickness 0 the container l1 and so at all times cause a perfect contact etween the lip of the container, the gasket 6 and side wall 3. When the gasket 6 is placedwithin the cover 1, the inside ofthe gasket tends slightly to follow the contour of the inside of the cover. The cover-sides 4 are sli htly flared out as seen in Figure 5 so that w en the cover and gasket are dropped into place onto the container opening the gasket slips down a short distance belowthe upper edge of the lip of the container. When the cover is forced down on the container the gasket flows up into the space between the bead 4 and the upper part of the cover. The bead or abutment 4 being rigid, this operation draws the edge 5 in slightly thus making a further seal between the container, the lower portion of the gasket 8 and the edge 5 of the cover.

When the cover and gasket are slid into place around a container 2, any deformation of the 1i '7 is compensated for by the flow of the ru her from the wider portions of the opening to thenarrower portions, thus giving at all times a sealed closure.

Further as soon as a difference in pressure is caused between the inside container and the outside, the atmospheric pressure bears against the ortion 8 of the asket. This pressure ten s to force the resi ient material of the gasket up into the container; However, due to the abutment 4 this is impossible and the result is, that the atmospheric pressure makes an exceedingly tight seal between, the lip 7 and the side 3 of the cover.

I have already described the facility with which my cover may be applied to acontainer. By means of a simple closing procedure, I have been able to eliminate a great amount of expensive capgiing machinery. Further my cap is adapte to be easily removable by merely causing pressure on the underside of the cap at the edge 5 and forcing it upwards. This tends to break. the seal between the gasket 6 and the lip 7 allowin the cap to be highly advantageous in classes of goods where the material in the container is not used at one time, but is left in the container and used at intervals.

I have disclosed and described only a particular embodiment of my device, but it is apparent to those skilled in the art that there are many modifications. I, therefore, do not wish to be limited by my specification and drawing, but only by the prior art and the appended claims.

What I claim is 2-- 1. A new article of manufacture, a container cover comprising a circular means havin a side wall, a resilient means within said si e wall having an outward flare, and an abutment-on the inner side of said side wall bearing against said resilient means.

2. A new article of manufacture, a container cover comprising a circular metal piece with a substantially vertical side wall, a flat sided resilient ring within said side wall having an outward flare, and an abutment on the inner side and extending around said side wall adapted to bear against said resilient ring.

3. An article of manufacture, a cover for a container comprising a circular means having a side wall, a resilient means within said side wall having an outward 'fiare, an'abutment on the inner side of side wall, said side wall being positioned to lie substantially parallel to the enclosed portion of the side wall container, said abutment being adapted to bear against said resilient means whereby a portion of the resilient means will be forced above and below said abutment between said side wall and the adjacent container and whereby a seal is formed both above and below said abutment as well as at said abutment.

4. A new article of manufacture, a cover for a container comprising a circular stifl member with a substantially vertical side wall, a fiat sided resilient ring within said side wall having an outward flare, and an abutment on the inner side of said side and extending around said side wall adapted to bear against said resilient ring when the cover is positioned on a container whereby a portion of the resilient means will'be forced above and below said abutment and whereby a seal will be formed'between the side wall and the enclosed portionof said container. 7

5. A new article of manufacture, a cover for a container comprising a stiff cap with a raised side, sai'dside being substantially parallel to the enclosed portion of a container, a

flat circular resilient ring fitting within said raised side, the inner diameter of the lower edge of the resilient ring being greater than the inner diameter of its upper edge and an abutment on its inner side extendin around its side wall, said abutment being a apted to bear against said resilient ring when the cover is positioned on a container, to force a portion of said ring above and below said abutment whereby a seal is formed between said side wall and the enclosed portion of said container both above and below said abutment.

fitted within said side wall havi 6. A new article of manufacture, a cover for a container comprising a stiff cap having.

a raised side wall, a resilient flat circular ring flare, said side wall being positioned substantially parallel to the enclosed wall portion of the container and having an abutment on the inner side thereof and extending there- 7 around, said abutment adapted to bear against said resilient ring whereby a portion of said resilient ring is forced above and below said abutment forming a seal between said side wall and the enclosed portion of a container both above and below saidabut-- ment, and a turned in lower edge on said side wall adapted to hold said resilient ring in place. 7

7 In a cover for a container, having a side wall substantially parallel to the enclosed portion-of the side wall of a container, an outwardly flaring resilient material within said side wall and an inwardly preformed groove extending aroun said walland bearing against said resilient material when said cover is positioned on said contamer whereby a portion of said resilient material is forced above and below said abutment forming a seal between said side wall and the enclosed portion of a container.

8. A new article of manufacture, a cover for a container comprising a stiff cap having a side wall adapted to lie substantially parallel to the enclosed portion of said container, said side wall having an inwardly extendin inflexible annular bead, a resilient flat side ring adapted to lie within said side wall, said bead being adapted to bear against and imbed in said resilient ring when the cover is positioned on said container whereb a portion of said resilient ring is forced to ow-along the enclosed portion of the container wall thereby an outward April, 192a g ROBERT'G. EUWER.

(projecting forming a seal above, below and at the bead between the side wall and the enclosed portion of the container.

9. .A new artlcle of manufacture, a cover for a container comprising 'a stiff-cap having a side wall adapted to lie substantially parallel to the enclosed portion of said container, said side wall having an inwardly extending inflexible annular bead whereby the inner diameter of the cover is smaller a the bead than at the top or bottom of the side 

